Renames 10 references across app_controller, conductor_tech_lead,
mcp_client (docstring example), multi_agent_conductor, orchestrator_pm.
5 call sites in ai_client.send_result(...) -> ai_client.send(...)
3 print strings mentioning send_result
1 docstring comment (conductor_tech_lead)
1 docstring example (mcp_client) 'src.ai_client.send_result' -> 'src.ai_client.send'
Test suite state: still red, but all src/-level call sites are now
renamed. Remaining failures are in test files (mocks and patches
that still reference send_result).
Refs: conductor/tracks/send_result_to_send_20260616/
Replaces deprecated ai_client.send(md_content='', user_message=user_message,
enable_tools=False) with ai_client.send_result(...) and branches on
result.ok. On error, logs the ui_message() and returns [] (the function
returns a list of track definitions or [] on failure).
The 3 tests in test_orchestrator_pm.py + 1 in test_orchestrator_pm_history.py
now fail because they mock src.ai_client.send. These will be fixed in
Phase 2.14-2.15 by mocking send_result instead.